﻿<template>
   <canvas id="canv" width="100%" height="100%" ></canvas>
</template>
<script>

  export default {
    data(){
      return {
        account:"",
        password:"",
        code:"",
        canvas:"",
        myChart:"",
      }
    },
    created(){

    },
    mounted(){
      this.makeCanvas()
    },
    methods: {
      makeCanvas(){
        var num = 200;
        var w = window.innerWidth;
        var h = window.innerHeight;
        var max = 100;
        var _x = 0;
        var _y = 0;
        var _z = 150;
        var dtr = function(d) {
          return d * Math.PI / 180;
        };

        var rnd = function() {
          return Math.sin(Math.floor(Math.random() * 360) * Math.PI / 180);
        };
        var dist = function(p1, p2, p3) {
          return Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2) + Math.pow(p2.z - p1.z, 2));
        };

        var cam = {
          obj: {
            x: _x,
            y: _y,
            z: _z
          },
          dest: {
            x: 0,
            y: 0,
            z: 1
          },
          dist: {
            x: 0,
            y: 0,
            z: 200
          },
          ang: {
            cplane: 0,
            splane: 0,
            ctheta: 0,
            stheta: 0
          },
          zoom: 1,
          disp: {
            x: w / 2,
            y: h / 2,
            z: 0
          },
          upd: function() {
            cam.dist.x = cam.dest.x - cam.obj.x;
            cam.dist.y = cam.dest.y - cam.obj.y;
            cam.dist.z = cam.dest.z - cam.obj.z;
            cam.ang.cplane = -cam.dist.z / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.z * cam.dist.z);
            cam.ang.splane = cam.dist.x / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.z * cam.dist.z);
            cam.ang.ctheta = Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.z * cam.dist.z) / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.y * cam.dist.y + cam.dist.z * cam.dist.z);
            cam.ang.stheta = -cam.dist.y / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.y * cam.dist.y + cam.dist.z * cam.dist.z);
          }
        };

        var trans = {
          parts: {
            sz: function(p, sz) {
              return {
                x: p.x * sz.x,
                y: p.y * sz.y,
                z: p.z * sz.z
              };
            },
            rot: {
              x: function(p, rot) {
                return {
                  x: p.x,
                  y: p.y * Math.cos(dtr(rot.x)) - p.z * Math.sin(dtr(rot.x)),
                  z: p.y * Math.sin(dtr(rot.x)) + p.z * Math.cos(dtr(rot.x))
                };
              },
              y: function(p, rot) {
                return {
                  x: p.x * Math.cos(dtr(rot.y)) + p.z * Math.sin(dtr(rot.y)),
                  y: p.y,
                  z: -p.x * Math.sin(dtr(rot.y)) + p.z * Math.cos(dtr(rot.y))
                };
              },
              z: function(p, rot) {
                return {
                  x: p.x * Math.cos(dtr(rot.z)) - p.y * Math.sin(dtr(rot.z)),
                  y: p.x * Math.sin(dtr(rot.z)) + p.y * Math.cos(dtr(rot.z)),
                  z: p.z
                };
              }
            },
            pos: function(p, pos) {
              return {
                x: p.x + pos.x,
                y: p.y + pos.y,
                z: p.z + pos.z
              };
            }
          },
          pov: {
            plane: function(p) {
              return {
                x: p.x * cam.ang.cplane + p.z * cam.ang.splane,
                y: p.y,
                z: p.x * -cam.ang.splane + p.z * cam.ang.cplane
              };
            },
            theta: function(p) {
              return {
                x: p.x,
                y: p.y * cam.ang.ctheta - p.z * cam.ang.stheta,
                z: p.y * cam.ang.stheta + p.z * cam.ang.ctheta
              };
            },
            set: function(p) {
              return {
                x: p.x - cam.obj.x,
                y: p.y - cam.obj.y,
                z: p.z - cam.obj.z
              };
            }
          },
          persp: function(p) {
            return {
              x: p.x * cam.dist.z / p.z * cam.zoom,
              y: p.y * cam.dist.z / p.z * cam.zoom,
              z: p.z * cam.zoom,
              p: cam.dist.z / p.z
            };
          },
          disp: function(p, disp) {
            return {
              x: p.x + disp.x,
              y: -p.y + disp.y,
              z: p.z + disp.z,
              p: p.p
            };
          },
          steps: function(_obj_, sz, rot, pos, disp) {
            var _args = trans.parts.sz(_obj_, sz);
            _args = trans.parts.rot.x(_args, rot);
            _args = trans.parts.rot.y(_args, rot);
            _args = trans.parts.rot.z(_args, rot);
            _args = trans.parts.pos(_args, pos);
            _args = trans.pov.plane(_args);
            _args = trans.pov.theta(_args);
            _args = trans.pov.set(_args);
            _args = trans.persp(_args);
            _args = trans.disp(_args, disp);
            return _args;
          }
        };

        (function() {
          "use strict";
          var threeD = function(param) {
            this.transIn = {};
            this.transOut = {};
            this.transIn.vtx = (param.vtx);
            this.transIn.sz = (param.sz);
            this.transIn.rot = (param.rot);
            this.transIn.pos = (param.pos);
          };

          threeD.prototype.vupd = function() {
            this.transOut = trans.steps(

              this.transIn.vtx,
              this.transIn.sz,
              this.transIn.rot,
              this.transIn.pos,
              cam.disp
            );
          };

          var Build = function() {
            this.vel = 0.04;
            this.lim = 360;
            this.diff = 200;
            this.initPos = 100;
            this.toX = _x;
            this.toY = _y;
            this.go();
          };

          Build.prototype.go = function() {
            this.canvas = document.getElementById("canv");
            this.canvas.width = window.innerWidth;
            this.canvas.height = window.innerHeight;
            this.$ = canv.getContext("2d");
            this.$.globalCompositeOperation = 'source-over';
            this.varr = [];
            this.dist = [];
            this.calc = [];

            for (var i = 0, len = num; i < len; i++) {
              this.add();
            }

            this.rotObj = {
              x: 0,
              y: 0,
              z: 0
            };
            this.objSz = {
              x: w / 5,
              y: h / 5,
              z: w / 5
            };
          };

          Build.prototype.add = function() {
            this.varr.push(new threeD({
              vtx: {
                x: rnd(),
                y: rnd(),
                z: rnd()
              },
              sz: {
                x: 0,
                y: 0,
                z: 0
              },
              rot: {
                x: 20,
                y: -20,
                z: 0
              },
              pos: {
                x: this.diff * Math.sin(360 * Math.random() * Math.PI / 180),
                y: this.diff * Math.sin(360 * Math.random() * Math.PI / 180),
                z: this.diff * Math.sin(360 * Math.random() * Math.PI / 180)
              }
            }));
            this.calc.push({
              x: 360 * Math.random(),
              y: 360 * Math.random(),
              z: 360 * Math.random()
            });
          };

          Build.prototype.upd = function() {
            cam.obj.x += (this.toX - cam.obj.x) * 0.05;
            cam.obj.y += (this.toY - cam.obj.y) * 0.05;
          };

          Build.prototype.draw = function() {
            this.$.clearRect(0, 0, this.canvas.width, this.canvas.height);
            cam.upd();
            this.rotObj.x += 0.1;
            this.rotObj.y += 0.1;
            this.rotObj.z += 0.1;

            for (var i = 0; i < this.varr.length; i++) {
              for (var val in this.calc[i]) {
                if (this.calc[i].hasOwnProperty(val)) {
                  this.calc[i][val] += this.vel;
                  if (this.calc[i][val] > this.lim) this.calc[i][val] = 0;
                }
              }

              this.varr[i].transIn.pos = {
                x: this.diff * Math.cos(this.calc[i].x * Math.PI / 180),
                y: this.diff * Math.sin(this.calc[i].y * Math.PI / 180),
                z: this.diff * Math.sin(this.calc[i].z * Math.PI / 180)
              };
              this.varr[i].transIn.rot = this.rotObj;
              this.varr[i].transIn.sz = this.objSz;
              this.varr[i].vupd();
              if (this.varr[i].transOut.p < 0) continue;
              var g = this.$.createRadialGradient(this.varr[i].transOut.x, this.varr[i].transOut.y, this.varr[i].transOut.p, this.varr[i].transOut.x, this.varr[i].transOut.y, this.varr[i].transOut.p * 2);
              this.$.globalCompositeOperation = 'lighter';
              g.addColorStop(0, 'hsla(255, 255%, 255%, 1)');
              g.addColorStop(.5, 'hsla(' + (i + 2) + ',85%, 40%,1)');
              g.addColorStop(1, 'hsla(' + (i) + ',85%, 40%,.5)');
              this.$.fillStyle = g;
              this.$.beginPath();
              this.$.arc(this.varr[i].transOut.x, this.varr[i].transOut.y, this.varr[i].transOut.p * 2, 0, Math.PI * 2, false);
              this.$.fill();
              this.$.closePath();
            }
          };
          Build.prototype.anim = function() {
            window.requestAnimationFrame = (function() {
              return window.requestAnimationFrame ||
                function(callback, element) {
                  window.setTimeout(callback, 1000 / 60);
                };
            })();
            var anim = function() {
              this.upd();
              this.draw();
              window.requestAnimationFrame(anim);

            }.bind(this);
            window.requestAnimationFrame(anim);
          };

          Build.prototype.run = function() {
            this.anim();

            window.addEventListener('mousemove', function(e) {
              this.toX = (e.clientX - this.canvas.width / 2) * -0.8;
              this.toY = (e.clientY - this.canvas.height / 2) * 0.8;
            }.bind(this));
            window.addEventListener('touchmove', function(e) {
              e.preventDefault();
              this.toX = (e.touches[0].clientX - this.canvas.width / 2) * -0.8;
              this.toY = (e.touches[0].clientY - this.canvas.height / 2) * 0.8;
            }.bind(this));
            window.addEventListener('mousedown', function(e) {
              for (var i = 0; i < 100; i++) {
                this.add();
              }
            }.bind(this));
            window.addEventListener('touchstart', function(e) {
              e.preventDefault();
              for (var i = 0; i < 100; i++) {
                this.add();
              }
            }.bind(this));
          };
          var app = new Build();
          app.run();
        })();
        /*window.addEventListener('resize', ()=>{
          this.canvas.width = w = window.innerWidth;
          this.canvas.height = h = window.innerHeight;
        }, false);*/
      }
    },
    components: {

    },

    destroyed(){

    },
    watch: {

    }
  }
</script>


<style lang="stylus" rel="stylesheet/stylus" >
  #canv
    opacity 0.1
</style>
